<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <el-row>
        <el-col>
          <!-- 添加角色按钮 -->
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开行 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bd-bottom', i1===0?'bd-top':'','v-center']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="6" :offset="0">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="18" :offset="0">
                <!-- 嵌套for渲染二级权限 -->
                <el-row :class="[i2===0?'':'bd-top','v-center']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18">
                    <el-tag type="warning" closable @close="removeRightById(scope.row, item3.id)" v-for="(item3) in item2.children" :key="item3.id">
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditRoleDialog(scope.row.id)">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteRoleById(scope.row.id)">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色弹出层 -->
    <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">

      <!-- 内容主体区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>

      <!-- 底部 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 编辑角色弹出层 -->
    <el-dialog title="编辑角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">

      <!-- 内容主体区域 -->
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>

      <!-- 底部 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限弹出层 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">

      <!-- 内容主体区域 -->
      <!-- 树形控件 -->
      <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>

      <!-- 底部 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表
      rolesList: [],
      addDialogVisible: false,
      editDialogVisible: false,
      setRightDialogVisible: false,
      // 所有权限数据列表
      rightsList: [],
      // tree控件属性绑定
      treeProps: {
        children: 'children',
        label: 'authName'
      },
      // tree选中的节点id数组
      defKeys: [],
      // 角色的id
      roleId: '',
      // 添加角色表单对象
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加角色表单的验证规则对象
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { required: false, message: '请输入角色描述', trigger: 'blur' }
        ]
      },
      // 编辑角色表单对象
      editForm: {},
      // 编辑角色表单的验证规则对象
      editFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { required: false, message: '请输入角色描述', trigger: 'blur' }
        ]
      }
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('获取角色列表失败！')
      this.rolesList = res.data
    },
    // 对话框关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 添加新角色
    addRoles() {
      this.$refs.addFormRef.validate(async vaild => {
        // console.log(vaild)
        if (!vaild) return 0
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) return this.$message.error('添加角色失败！')
        // 提示成功
        this.$message.success('添加角色成功！')
        // 关闭添加角色对话框
        this.addDialogVisible = false
        // 重新获取数据
        this.getRolesList()
      })
    },
    // 显示编辑角色信息对话框
    async showEditRoleDialog(id) {
      //   console.log(id)
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('查询角色信息失败！')

      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 编辑角色信息
    editRole() {
      this.$refs.editFormRef.validate(async vaild => {
        // console.log(vaild)
        if (!vaild) return 0
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        if (res.meta.status !== 200) return this.$message.error('更新角色信息失败！')

        this.$message.success('更新角色信息成功！')
        this.editDialogVisible = false
        this.getRolesList()
      })
    },
    // 根据角色id删除角色
    async deleteRoleById(id) {
      //   console.log(id)
      const confirmRes = await this.$confirm(
        '此操作将删除该角色，是否继续？',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
      //   console.log(confirmRes)
      if (confirmRes !== 'confirm') return this.$message.info('已取消删除操作')

      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('删除角色失败！')

      this.$message.success('删除角色成功！')
      this.getRolesList()
    },
    // 根据角色id和权限id移除权限
    async removeRightById(role, rightId) {
      // console.log(id)
      const confirmRet = await this.$confirm(
        '此操作将移除该权限，是否继续？',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

      if (confirmRet !== 'confirm') return this.$message.info('已取消移除操作')
      // console.log('确认了删除')
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) return this.$message.error('移除权限失败！')

      this.$message.success('移除权限成功！')
      // this.getRolesList()
      // 刷新部分数据，提升用户体验
      role.children = res.data
    },
    // 关闭分配权限对话框
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取权限数据失败！')

      this.rightsList = res.data
      // console.log(this.rightsList)

      // 递归获取当前角色的所有权限id
      this.getLeafKeys(role, this.defKeys)
      // 打开对话框
      this.setRightDialogVisible = true
    },
    // 递归获取所有角色下的权限id，并保存到defKeys数组中
    getLeafKeys(node, arr) {
      // 如果当前node节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }

      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      // console.log(keys)
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })

      if (res.meta.status !== 200) return this.$message.error('分配权限失败！')

      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 5px;
}
.bd-bottom {
  border-bottom: 1px solid #eee;
}
.bd-top {
  border-top: 1px solid #eee;
}
.v-center {
  display: flex;
  align-items: center;
}
</style>
